/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --accent-cyan: #00F0FF;
      --accent-pink: #FF3366;
      --bg-light: #FAFAFA;
      --text-dark: #1A1A2E;
      --text-muted: #6B7280;
      --text-light: #FFFFFF;
      --card-shadow: 0 8px 32px rgba(0, 240, 255, 0.08);
      --card-glow: 1px solid rgba(0, 240, 255, 0.25);
      --radius-card: 16px;
      --radius-inner: 12px;
      --radius-btn: 50px;
      --transition-smooth: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航杂志频道风格 */
    .nav-brand-row {
      background: rgba(10, 14, 39, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.15);
    }
    .nav-channel-row {
      background: rgba(10, 14, 39, 0.85);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid rgba(255, 51, 102, 0.2);
    }
    .channel-tag {
      position: relative;
      font-weight: 600;
      font-size: 0.95rem;
      letter-spacing: 0.3px;
      color: #cfd8e6;
      padding-bottom: 6px;
      transition: var(--transition-smooth);
    }
    .channel-tag::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.2s ease;
    }
    .channel-tag:hover {
      color: var(--accent-cyan);
    }
    .channel-tag:hover::after {
      width: 100%;
    }
    .channel-tag.active {
      color: var(--accent-pink);
    }
    .channel-tag.active::after {
      width: 100%;
      background: var(--accent-pink);
    }
    /* 汉堡菜单 */
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      color: var(--accent-cyan);
      font-size: 1.8rem;
      cursor: pointer;
    }
    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .channel-row-desktop {
        display: none;
      }
      .channel-row-mobile {
        display: flex;
        overflow-x: auto;
        white-space: nowrap;
        gap: 20px;
        padding: 12px 0;
        scrollbar-width: thin;
        scrollbar-color: var(--accent-cyan) transparent;
      }
      .channel-row-mobile::-webkit-scrollbar {
        height: 3px;
      }
      .channel-row-mobile::-webkit-scrollbar-thumb {
        background: var(--accent-cyan);
        border-radius: 10px;
      }
    }
    @media (min-width: 769px) {
      .channel-row-mobile {
        display: none;
      }
    }
    /* 按钮 */
    .btn-primary {
      background: linear-gradient(135deg, #00F0FF 0%, #0099CC 100%);
      color: #0A0E27;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      box-shadow: 0 4px 14px rgba(0, 240, 255, 0.4);
      transition: var(--transition-smooth);
      border: none;
      cursor: pointer;
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent-cyan);
      color: var(--accent-cyan);
      font-weight: 700;
      padding: 12px 34px;
      border-radius: var(--radius-btn);
      transition: var(--transition-smooth);
      cursor: pointer;
    }
    .btn-outline:hover {
      background: rgba(0, 240, 255, 0.15);
      border-color: #fff;
      color: #fff;
    }
    .btn-white {
      background: #fff;
      color: #0A0E27;
      font-weight: 700;
      padding: 14px 40px;
      border-radius: var(--radius-btn);
      transition: var(--transition-smooth);
      border: none;
      cursor: pointer;
    }
    .btn-white:hover {
      background: var(--accent-pink);
      color: #fff;
      box-shadow: 0 0 18px rgba(255, 51, 102, 0.6);
    }
    /* 卡片效果 */
    .service-card {
      background: #fff;
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      transition: var(--transition-smooth);
      border: 1px solid transparent;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 16px 40px rgba(0, 240, 255, 0.15);
      border-color: var(--accent-cyan);
    }
    .case-card {
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: 0 8px 20px rgba(0,0,0,0.05);
      transition: var(--transition-smooth);
      background: #fff;
    }
    .case-card:hover img {
      transform: scale(1.04);
    }
    .case-card img {
      transition: transform 0.4s ease;
    }
    .data-badge {
      border: 1px solid rgba(0, 240, 255, 0.45);
      border-radius: 24px;
      padding: 20px 16px;
      background: rgba(10, 14, 39, 0.7);
      backdrop-filter: blur(10px);
    }
    .faq-item {
      border: 1px solid rgba(0, 240, 255, 0.2);
      border-radius: 12px;
      background: #fff;
      margin-bottom: 12px;
      transition: var(--transition-smooth);
    }
    .faq-item.active {
      border-color: var(--accent-cyan);
    }
    .section-padding {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      .section-padding {
        padding: 60px 0;
      }
    }
    .bg-grid {
      background-image: radial-gradient(rgba(0,240,255,0.08) 1px, transparent 1px);
      background-size: 28px 28px;
    }